-
Notifications
You must be signed in to change notification settings - Fork 463
/
etcd.go
1054 lines (953 loc) · 36.7 KB
/
etcd.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// Copyright (c) 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package etcd
import (
"context"
"fmt"
"time"
druidv1alpha1 "github.com/gardener/etcd-druid/api/v1alpha1"
gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
"github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
"github.com/gardener/gardener/pkg/client/kubernetes"
"github.com/gardener/gardener/pkg/controllerutils"
gardenletconfig "github.com/gardener/gardener/pkg/gardenlet/apis/config"
"github.com/gardener/gardener/pkg/operation/botanist/component"
"github.com/gardener/gardener/pkg/operation/botanist/component/monitoring"
"github.com/gardener/gardener/pkg/utils"
gutil "github.com/gardener/gardener/pkg/utils/gardener"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
"github.com/gardener/gardener/pkg/utils/kubernetes/health"
secretutils "github.com/gardener/gardener/pkg/utils/secrets"
secretsmanager "github.com/gardener/gardener/pkg/utils/secrets/manager"
hvpav1alpha1 "github.com/gardener/hvpa-controller/api/v1alpha1"
"github.com/go-logr/logr"
appsv1 "k8s.io/api/apps/v1"
autoscalingv2beta1 "k8s.io/api/autoscaling/v2beta1"
corev1 "k8s.io/api/core/v1"
networkingv1 "k8s.io/api/networking/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/selection"
"k8s.io/apimachinery/pkg/util/intstr"
vpaautoscalingv1 "k8s.io/autoscaler/vertical-pod-autoscaler/pkg/apis/autoscaling.k8s.io/v1"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// Class is a string type alias for etcd classes.
type Class string
const (
// ClassNormal is a constant for a normal etcd (without extensive metrics or higher resource settings, etc.)
ClassNormal Class = "normal"
// ClassImportant is a constant for an important etcd (with extensive metrics or higher resource settings, etc.).
// Such etcds are also unsafe to evict (from the PoV of the cluster-autoscaler when trying to scale down).
ClassImportant Class = "important"
// SecretNameClient is the name of the secret containing the client certificate and key for the etcd.
SecretNameClient = "etcd-client"
secretNamePrefixServer = "etcd-server-"
// secretNamePrefixPeerServer is the prefix for the secret containing the server certificate and key for the etcd peer network.
secretNamePrefixPeerServer = "etcd-peer-server-"
// LabelAppValue is the value of a label whose key is 'app'.
LabelAppValue = "etcd-statefulset"
// NetworkPolicyNameClient is the name of a network policy that allows ingress traffic to etcd from certain sources.
NetworkPolicyNameClient = "allow-etcd"
// NetworkPolicyNamePeer is the name of a network policy that allows ingress traffic to etcd from member pods.
NetworkPolicyNamePeer = "allow-etcd-peer"
portNameClient = "client"
portNameBackupRestore = "backuprestore"
statefulSetNamePrefix = "etcd"
containerNameEtcd = "etcd"
containerNameBackupRestore = "backup-restore"
)
var (
// TimeNow is a function returning the current time exposed for testing.
TimeNow = time.Now
// PortEtcdPeer is the port exposed by etcd for server-to-server communication.
PortEtcdPeer = int32(2380)
// PortEtcdClient is the port exposed by etcd for client communication.
PortEtcdClient = int32(2379)
// PortBackupRestore is the client port exposed by the backup-restore sidecar container.
PortBackupRestore = int32(8080)
)
// ServiceName returns the service name for an etcd for the given role.
func ServiceName(role string) string {
return fmt.Sprintf("etcd-%s-client", role)
}
// Interface contains functions for a etcd deployer.
type Interface interface {
component.DeployWaiter
component.MonitoringComponent
// Snapshot triggers the backup-restore sidecar to perform a full snapshot in case backup configuration is provided.
Snapshot(context.Context, kubernetes.PodExecutor) error
// SetBackupConfig sets the backup configuration.
SetBackupConfig(config *BackupConfig)
// SetHVPAConfig sets the HVPA configuration.
SetHVPAConfig(config *HVPAConfig)
// Get retrieves the Etcd resource
Get(context.Context) (*druidv1alpha1.Etcd, error)
// SetOwnerCheckConfig sets the owner check configuration.
SetOwnerCheckConfig(config *OwnerCheckConfig)
// Scale scales the etcd resource to the given replica count.
Scale(context.Context, int32) error
// RolloutPeerCA gets the peer CA and patches the
// related `etcd` resource to use this new CA for peer communication.
RolloutPeerCA(context.Context) error
}
// New creates a new instance of DeployWaiter for the Etcd.
func New(
c client.Client,
log logr.Logger,
namespace string,
secretsManager secretsmanager.Interface,
role string,
class Class,
annotations map[string]string,
failureToleranceType *gardencorev1beta1.FailureToleranceType,
replicas *int32,
storageCapacity string,
defragmentationSchedule *string,
caRotationPhase gardencorev1beta1.ShootCredentialsRotationPhase,
k8sVersion string,
) Interface {
name := "etcd-" + role
log = log.WithValues("etcd", client.ObjectKey{Namespace: namespace, Name: name})
return &etcd{
client: c,
log: log,
namespace: namespace,
secretsManager: secretsManager,
role: role,
class: class,
annotations: annotations,
failureToleranceType: failureToleranceType,
replicas: replicas,
storageCapacity: storageCapacity,
defragmentationSchedule: defragmentationSchedule,
caRotationPhase: caRotationPhase,
k8sVersion: k8sVersion,
etcd: &druidv1alpha1.Etcd{
ObjectMeta: metav1.ObjectMeta{
Name: name,
Namespace: namespace,
},
},
}
}
type etcd struct {
client client.Client
log logr.Logger
namespace string
secretsManager secretsmanager.Interface
role string
class Class
annotations map[string]string
failureToleranceType *gardencorev1beta1.FailureToleranceType
replicas *int32
storageCapacity string
defragmentationSchedule *string
caRotationPhase gardencorev1beta1.ShootCredentialsRotationPhase
k8sVersion string
etcd *druidv1alpha1.Etcd
backupConfig *BackupConfig
hvpaConfig *HVPAConfig
ownerCheckConfig *OwnerCheckConfig
}
func (e *etcd) hasHAControlPlane() bool {
return helper.IsFailureToleranceTypeNode(e.failureToleranceType) || helper.IsFailureToleranceTypeZone(e.failureToleranceType)
}
func (e *etcd) Deploy(ctx context.Context) error {
var (
existingEtcd *druidv1alpha1.Etcd
existingSts *appsv1.StatefulSet
)
if err := e.client.Get(ctx, client.ObjectKeyFromObject(e.etcd), e.etcd); err != nil {
if !apierrors.IsNotFound(err) {
return err
}
} else {
existingEtcd = e.etcd.DeepCopy()
}
stsName := e.etcd.Name
if existingEtcd != nil && existingEtcd.Status.Etcd != nil && existingEtcd.Status.Etcd.Name != "" {
stsName = existingEtcd.Status.Etcd.Name
}
var sts appsv1.StatefulSet
if err := e.client.Get(ctx, client.ObjectKey{Namespace: e.namespace, Name: stsName}, &sts); err != nil {
if !apierrors.IsNotFound(err) {
return err
}
} else {
existingSts = &sts
}
var (
clientNetworkPolicy = e.emptyNetworkPolicy(NetworkPolicyNameClient)
peerNetworkPolicy = e.emptyNetworkPolicy(NetworkPolicyNamePeer)
hvpa = e.emptyHVPA()
replicas = e.computeReplicas(existingEtcd)
schedulingConstraints druidv1alpha1.SchedulingConstraints
protocolTCP = corev1.ProtocolTCP
intStrPortEtcdClient = intstr.FromInt(int(PortEtcdClient))
intStrPortEtcdPeer = intstr.FromInt(int(PortEtcdPeer))
intStrPortBackupRestore = intstr.FromInt(int(PortBackupRestore))
resourcesEtcd, resourcesBackupRestore = e.computeContainerResources(existingSts)
quota = resource.MustParse("8Gi")
storageCapacity = resource.MustParse(e.storageCapacity)
garbageCollectionPolicy = druidv1alpha1.GarbageCollectionPolicy(druidv1alpha1.GarbageCollectionPolicyExponential)
garbageCollectionPeriod = metav1.Duration{Duration: 12 * time.Hour}
compressionPolicy = druidv1alpha1.GzipCompression
compressionSpec = druidv1alpha1.CompressionSpec{
Enabled: pointer.Bool(true),
Policy: &compressionPolicy,
}
annotations map[string]string
metrics = druidv1alpha1.Basic
volumeClaimTemplate = e.etcd.Name
minAllowed = corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("50m"),
corev1.ResourceMemory: resource.MustParse("200M"),
}
)
if e.class == ClassImportant {
annotations = map[string]string{"cluster-autoscaler.kubernetes.io/safe-to-evict": "false"}
metrics = druidv1alpha1.Extensive
volumeClaimTemplate = e.role + "-etcd"
minAllowed = corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("200m"),
corev1.ResourceMemory: resource.MustParse("700M"),
}
}
etcdCASecret, found := e.secretsManager.Get(v1beta1constants.SecretNameCAETCD)
if !found {
return fmt.Errorf("secret %q not found", v1beta1constants.SecretNameCAETCD)
}
serverSecret, err := e.secretsManager.Generate(ctx, &secretutils.CertificateSecretConfig{
Name: secretNamePrefixServer + e.role,
CommonName: "etcd-server",
DNSNames: e.clientServiceDNSNames(),
CertType: secretutils.ServerClientCert,
SkipPublishingCACertificate: true,
}, secretsmanager.SignedByCA(v1beta1constants.SecretNameCAETCD), secretsmanager.Rotate(secretsmanager.InPlace))
if err != nil {
return err
}
clientSecret, err := e.secretsManager.Generate(ctx, &secretutils.CertificateSecretConfig{
Name: SecretNameClient,
CommonName: "etcd-client",
CertType: secretutils.ClientCert,
SkipPublishingCACertificate: true,
}, secretsmanager.SignedByCA(v1beta1constants.SecretNameCAETCD), secretsmanager.Rotate(secretsmanager.InPlace))
if err != nil {
return err
}
// add peer certs if shoot has HA control plane
var (
etcdPeerCASecretName string
peerServerSecretName string
)
if etcdPeerCASecretName, peerServerSecretName, err = e.handlePeerCertificates(ctx); err != nil {
return err
}
// add pod anti-affinity rules for etcd if shoot has a HA control plane
if helper.IsFailureToleranceTypeZone(e.failureToleranceType) {
schedulingConstraints.Affinity = &corev1.Affinity{
PodAntiAffinity: &corev1.PodAntiAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: []corev1.PodAffinityTerm{
{
TopologyKey: corev1.LabelTopologyZone,
LabelSelector: &metav1.LabelSelector{
MatchLabels: e.getRoleLabels(),
},
},
},
},
}
} else if helper.IsFailureToleranceTypeNode(e.failureToleranceType) {
schedulingConstraints.Affinity = &corev1.Affinity{
PodAntiAffinity: &corev1.PodAntiAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: []corev1.PodAffinityTerm{
{
TopologyKey: corev1.LabelHostname,
LabelSelector: &metav1.LabelSelector{
MatchLabels: e.getRoleLabels(),
},
},
},
},
}
}
if _, err := controllerutils.GetAndCreateOrMergePatch(ctx, e.client, clientNetworkPolicy, func() error {
clientNetworkPolicy.Annotations = map[string]string{
v1beta1constants.GardenerDescription: "Allows Ingress to etcd pods from the Shoot's Kubernetes API Server.",
}
clientNetworkPolicy.Labels = map[string]string{
v1beta1constants.GardenRole: v1beta1constants.GardenRoleControlPlane,
}
clientNetworkPolicy.Spec.PodSelector = metav1.LabelSelector{
MatchLabels: GetLabels(),
}
clientNetworkPolicy.Spec.Ingress = []networkingv1.NetworkPolicyIngressRule{
{
From: []networkingv1.NetworkPolicyPeer{
{
PodSelector: &metav1.LabelSelector{
// TODO: Replace below map with a function call to the to-be-introduced kubeapiserver package.
MatchLabels: map[string]string{
v1beta1constants.GardenRole: v1beta1constants.GardenRoleControlPlane,
v1beta1constants.LabelApp: v1beta1constants.LabelKubernetes,
v1beta1constants.LabelRole: v1beta1constants.LabelAPIServer,
},
},
},
{
PodSelector: &metav1.LabelSelector{
MatchLabels: monitoring.GetPrometheusLabels(),
},
},
},
Ports: []networkingv1.NetworkPolicyPort{
{
Protocol: &protocolTCP,
Port: &intStrPortEtcdClient,
},
{
Protocol: &protocolTCP,
Port: &intStrPortBackupRestore,
},
},
},
}
clientNetworkPolicy.Spec.Egress = nil
clientNetworkPolicy.Spec.PolicyTypes = []networkingv1.PolicyType{networkingv1.PolicyTypeIngress}
return nil
}); err != nil {
return err
}
// create peer network policy only if the shoot has a HA control plane
if e.hasHAControlPlane() {
if _, err := controllerutils.GetAndCreateOrMergePatch(ctx, e.client, peerNetworkPolicy, func() error {
peerNetworkPolicy.Annotations = map[string]string{
v1beta1constants.GardenerDescription: "Allows Ingress to etcd pods from etcd pods for peer communication.",
}
peerNetworkPolicy.Labels = map[string]string{
v1beta1constants.GardenRole: v1beta1constants.GardenRoleControlPlane,
}
peerNetworkPolicy.Spec.PodSelector = metav1.LabelSelector{
MatchLabels: GetLabels(),
}
peerNetworkPolicy.Spec.Egress = []networkingv1.NetworkPolicyEgressRule{
{
Ports: []networkingv1.NetworkPolicyPort{
{
Protocol: &protocolTCP,
Port: &intStrPortEtcdClient,
},
{
Protocol: &protocolTCP,
Port: &intStrPortBackupRestore,
},
{
Protocol: &protocolTCP,
Port: &intStrPortEtcdPeer,
},
},
To: []networkingv1.NetworkPolicyPeer{
{
PodSelector: &metav1.LabelSelector{
MatchLabels: GetLabels(),
},
},
},
},
}
peerNetworkPolicy.Spec.Ingress = []networkingv1.NetworkPolicyIngressRule{
{
From: []networkingv1.NetworkPolicyPeer{
{
PodSelector: &metav1.LabelSelector{
MatchLabels: GetLabels(),
},
},
},
Ports: []networkingv1.NetworkPolicyPort{
{
Protocol: &protocolTCP,
Port: &intStrPortEtcdClient,
},
{
Protocol: &protocolTCP,
Port: &intStrPortBackupRestore,
},
{
Protocol: &protocolTCP,
Port: &intStrPortEtcdPeer,
},
},
},
}
peerNetworkPolicy.Spec.PolicyTypes = []networkingv1.PolicyType{
networkingv1.PolicyTypeIngress,
networkingv1.PolicyTypeEgress,
}
return nil
}); err != nil {
return err
}
}
if _, err := controllerutils.GetAndCreateOrMergePatch(ctx, e.client, e.etcd, func() error {
e.etcd.Annotations = map[string]string{
v1beta1constants.GardenerOperation: v1beta1constants.GardenerOperationReconcile,
v1beta1constants.GardenerTimestamp: TimeNow().UTC().String(),
}
e.etcd.Labels = map[string]string{
v1beta1constants.LabelRole: e.role,
v1beta1constants.GardenRole: v1beta1constants.GardenRoleControlPlane,
}
e.etcd.Spec.Replicas = replicas
e.etcd.Spec.SchedulingConstraints = schedulingConstraints
e.etcd.Spec.PriorityClassName = pointer.String(v1beta1constants.PriorityClassNameShootControlPlane500)
e.etcd.Spec.Annotations = annotations
e.etcd.Spec.Labels = utils.MergeStringMaps(e.getRoleLabels(), e.getDeprecatedRoleLabels(), map[string]string{
v1beta1constants.LabelApp: LabelAppValue,
v1beta1constants.LabelNetworkPolicyToDNS: v1beta1constants.LabelNetworkPolicyAllowed,
v1beta1constants.LabelNetworkPolicyToPublicNetworks: v1beta1constants.LabelNetworkPolicyAllowed,
v1beta1constants.LabelNetworkPolicyToPrivateNetworks: v1beta1constants.LabelNetworkPolicyAllowed,
v1beta1constants.LabelNetworkPolicyToSeedAPIServer: v1beta1constants.LabelNetworkPolicyAllowed,
})
e.etcd.Spec.Selector = &metav1.LabelSelector{
MatchLabels: utils.MergeStringMaps(e.getDeprecatedRoleLabels(), map[string]string{
v1beta1constants.LabelApp: LabelAppValue,
}),
}
e.etcd.Spec.Etcd = druidv1alpha1.EtcdConfig{
Resources: resourcesEtcd,
ClientUrlTLS: &druidv1alpha1.TLSConfig{
TLSCASecretRef: druidv1alpha1.SecretReference{
SecretReference: corev1.SecretReference{
Name: etcdCASecret.Name,
Namespace: etcdCASecret.Namespace,
},
DataKey: pointer.String(secretutils.DataKeyCertificateBundle),
},
ServerTLSSecretRef: corev1.SecretReference{
Name: serverSecret.Name,
Namespace: serverSecret.Namespace,
},
ClientTLSSecretRef: corev1.SecretReference{
Name: clientSecret.Name,
Namespace: clientSecret.Namespace,
},
},
ServerPort: &PortEtcdPeer,
ClientPort: &PortEtcdClient,
Metrics: &metrics,
DefragmentationSchedule: e.computeDefragmentationSchedule(existingEtcd),
Quota: "a,
}
// TODO(timuthy): Once https://github.com/gardener/etcd-backup-restore/issues/538 is resolved we can enable PeerUrlTLS for all remaining clusters as well.
if e.hasHAControlPlane() {
e.etcd.Spec.Etcd.PeerUrlTLS = &druidv1alpha1.TLSConfig{
TLSCASecretRef: druidv1alpha1.SecretReference{
SecretReference: corev1.SecretReference{
Name: etcdPeerCASecretName,
Namespace: e.namespace,
},
DataKey: pointer.String(secretutils.DataKeyCertificateBundle),
},
ServerTLSSecretRef: corev1.SecretReference{
Name: peerServerSecretName,
Namespace: e.namespace,
},
}
}
e.etcd.Spec.Backup = druidv1alpha1.BackupSpec{
TLS: &druidv1alpha1.TLSConfig{
TLSCASecretRef: druidv1alpha1.SecretReference{
SecretReference: corev1.SecretReference{
Name: etcdCASecret.Name,
Namespace: etcdCASecret.Namespace,
},
DataKey: pointer.String(secretutils.DataKeyCertificateBundle),
},
ServerTLSSecretRef: corev1.SecretReference{
Name: serverSecret.Name,
Namespace: serverSecret.Namespace,
},
ClientTLSSecretRef: corev1.SecretReference{
Name: clientSecret.Name,
Namespace: clientSecret.Namespace,
},
},
Port: &PortBackupRestore,
Resources: resourcesBackupRestore,
GarbageCollectionPolicy: &garbageCollectionPolicy,
GarbageCollectionPeriod: &garbageCollectionPeriod,
SnapshotCompression: &compressionSpec,
}
if e.backupConfig != nil {
var (
provider = druidv1alpha1.StorageProvider(e.backupConfig.Provider)
deltaSnapshotPeriod = metav1.Duration{Duration: 5 * time.Minute}
deltaSnapshotMemoryLimit = resource.MustParse("100Mi")
)
e.etcd.Spec.Backup.Store = &druidv1alpha1.StoreSpec{
SecretRef: &corev1.SecretReference{Name: e.backupConfig.SecretRefName},
Container: &e.backupConfig.Container,
Provider: &provider,
Prefix: fmt.Sprintf("%s/etcd-%s", e.backupConfig.Prefix, e.role),
}
e.etcd.Spec.Backup.FullSnapshotSchedule = e.computeFullSnapshotSchedule(existingEtcd)
e.etcd.Spec.Backup.DeltaSnapshotPeriod = &deltaSnapshotPeriod
e.etcd.Spec.Backup.DeltaSnapshotMemoryLimit = &deltaSnapshotMemoryLimit
if e.backupConfig.LeaderElection != nil {
e.etcd.Spec.Backup.LeaderElection = &druidv1alpha1.LeaderElectionSpec{
EtcdConnectionTimeout: e.backupConfig.LeaderElection.EtcdConnectionTimeout,
ReelectionPeriod: e.backupConfig.LeaderElection.ReelectionPeriod,
}
}
}
if e.ownerCheckConfig != nil {
e.etcd.Spec.Backup.OwnerCheck = &druidv1alpha1.OwnerCheckSpec{
Name: e.ownerCheckConfig.Name,
ID: e.ownerCheckConfig.ID,
Interval: &metav1.Duration{Duration: 30 * time.Second},
Timeout: &metav1.Duration{Duration: 2 * time.Minute},
DNSCacheTTL: &metav1.Duration{Duration: 1 * time.Minute},
}
}
e.etcd.Spec.StorageCapacity = &storageCapacity
e.etcd.Spec.VolumeClaimTemplate = &volumeClaimTemplate
return nil
}); err != nil {
return err
}
if e.hvpaConfig != nil && e.hvpaConfig.Enabled {
var (
hpaLabels = map[string]string{v1beta1constants.LabelRole: "etcd-hpa-" + e.role}
vpaLabels = map[string]string{v1beta1constants.LabelRole: "etcd-vpa-" + e.role}
updateModeAuto = hvpav1alpha1.UpdateModeAuto
containerPolicyOff = vpaautoscalingv1.ContainerScalingModeOff
controlledValues = vpaautoscalingv1.ContainerControlledValuesRequestsOnly
)
scaleDownUpdateMode := e.hvpaConfig.ScaleDownUpdateMode
if scaleDownUpdateMode == nil {
scaleDownUpdateMode = pointer.String(hvpav1alpha1.UpdateModeMaintenanceWindow)
}
if _, err := controllerutils.GetAndCreateOrMergePatch(ctx, e.client, hvpa, func() error {
hvpa.Labels = utils.MergeStringMaps(e.getRoleLabels(), map[string]string{
v1beta1constants.LabelApp: LabelAppValue,
})
hvpa.Spec.Replicas = pointer.Int32(1)
hvpa.Spec.MaintenanceTimeWindow = &hvpav1alpha1.MaintenanceTimeWindow{
Begin: e.hvpaConfig.MaintenanceTimeWindow.Begin,
End: e.hvpaConfig.MaintenanceTimeWindow.End,
}
hvpa.Spec.Hpa = hvpav1alpha1.HpaSpec{
Selector: &metav1.LabelSelector{MatchLabels: hpaLabels},
Deploy: false,
Template: hvpav1alpha1.HpaTemplate{
ObjectMeta: metav1.ObjectMeta{
Labels: hpaLabels,
},
Spec: hvpav1alpha1.HpaTemplateSpec{
MinReplicas: pointer.Int32(int32(replicas)),
MaxReplicas: int32(replicas),
Metrics: []autoscalingv2beta1.MetricSpec{
{
Type: autoscalingv2beta1.ResourceMetricSourceType,
Resource: &autoscalingv2beta1.ResourceMetricSource{
Name: corev1.ResourceCPU,
TargetAverageUtilization: pointer.Int32(80),
},
},
{
Type: autoscalingv2beta1.ResourceMetricSourceType,
Resource: &autoscalingv2beta1.ResourceMetricSource{
Name: corev1.ResourceMemory,
TargetAverageUtilization: pointer.Int32(80),
},
},
},
},
},
}
hvpa.Spec.Vpa = hvpav1alpha1.VpaSpec{
Selector: &metav1.LabelSelector{MatchLabels: vpaLabels},
Deploy: true,
ScaleUp: hvpav1alpha1.ScaleType{
UpdatePolicy: hvpav1alpha1.UpdatePolicy{
UpdateMode: &updateModeAuto,
},
StabilizationDuration: pointer.String("5m"),
MinChange: hvpav1alpha1.ScaleParams{
CPU: hvpav1alpha1.ChangeParams{
Value: pointer.String("1"),
Percentage: pointer.Int32(80),
},
Memory: hvpav1alpha1.ChangeParams{
Value: pointer.String("2G"),
Percentage: pointer.Int32(80),
},
},
},
ScaleDown: hvpav1alpha1.ScaleType{
UpdatePolicy: hvpav1alpha1.UpdatePolicy{
UpdateMode: scaleDownUpdateMode,
},
StabilizationDuration: pointer.String("15m"),
MinChange: hvpav1alpha1.ScaleParams{
CPU: hvpav1alpha1.ChangeParams{
Value: pointer.String("1"),
Percentage: pointer.Int32(80),
},
Memory: hvpav1alpha1.ChangeParams{
Value: pointer.String("2G"),
Percentage: pointer.Int32(80),
},
},
},
LimitsRequestsGapScaleParams: hvpav1alpha1.ScaleParams{
CPU: hvpav1alpha1.ChangeParams{
Value: pointer.String("2"),
Percentage: pointer.Int32(40),
},
Memory: hvpav1alpha1.ChangeParams{
Value: pointer.String("5G"),
Percentage: pointer.Int32(40),
},
},
Template: hvpav1alpha1.VpaTemplate{
ObjectMeta: metav1.ObjectMeta{
Labels: vpaLabels,
},
Spec: hvpav1alpha1.VpaTemplateSpec{
ResourcePolicy: &vpaautoscalingv1.PodResourcePolicy{
ContainerPolicies: []vpaautoscalingv1.ContainerResourcePolicy{
{
ContainerName: containerNameEtcd,
MinAllowed: minAllowed,
MaxAllowed: corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("4"),
corev1.ResourceMemory: resource.MustParse("30G"),
},
ControlledValues: &controlledValues,
},
{
ContainerName: containerNameBackupRestore,
Mode: &containerPolicyOff,
ControlledValues: &controlledValues,
},
},
},
},
},
}
hvpa.Spec.WeightBasedScalingIntervals = []hvpav1alpha1.WeightBasedScalingInterval{
{
VpaWeight: hvpav1alpha1.VpaOnly,
StartReplicaCount: int32(replicas),
LastReplicaCount: int32(replicas),
},
}
hvpa.Spec.TargetRef = &autoscalingv2beta1.CrossVersionObjectReference{
APIVersion: appsv1.SchemeGroupVersion.String(),
Kind: "StatefulSet",
Name: stsName,
}
return nil
}); err != nil {
return err
}
} else {
if err := kutil.DeleteObjects(ctx, e.client, hvpa); err != nil {
return err
}
}
return nil
}
func (e *etcd) Destroy(ctx context.Context) error {
if err := gutil.ConfirmDeletion(ctx, e.client, e.etcd); client.IgnoreNotFound(err) != nil {
return err
}
if err := kutil.DeleteObjects(
ctx,
e.client,
e.emptyHVPA(),
e.etcd,
e.emptyNetworkPolicy(NetworkPolicyNameClient),
); err != nil {
return err
}
if e.hasHAControlPlane() {
return kutil.DeleteObject(ctx, e.client, e.emptyNetworkPolicy(NetworkPolicyNamePeer))
}
return nil
}
// TODO(timuthy): remove this function in a future release. Instead we can use `getRoleLabels` as soon as new labels
// have been added to all etcd StatefulSets.
func (e *etcd) getDeprecatedRoleLabels() map[string]string {
return map[string]string{
v1beta1constants.DeprecatedGardenRole: v1beta1constants.GardenRoleControlPlane,
v1beta1constants.LabelRole: e.role,
}
}
func (e *etcd) getRoleLabels() map[string]string {
return utils.MergeStringMaps(map[string]string{
v1beta1constants.GardenRole: v1beta1constants.GardenRoleControlPlane,
v1beta1constants.LabelRole: e.role,
})
}
// GetLabels returns a set of labels that is common for all etcd resources.
func GetLabels() map[string]string {
return map[string]string{
v1beta1constants.GardenRole: v1beta1constants.GardenRoleControlPlane,
v1beta1constants.LabelApp: LabelAppValue,
}
}
func (e *etcd) emptyNetworkPolicy(name string) *networkingv1.NetworkPolicy {
return &networkingv1.NetworkPolicy{ObjectMeta: metav1.ObjectMeta{Name: name, Namespace: e.namespace}}
}
func (e *etcd) emptyHVPA() *hvpav1alpha1.Hvpa {
return &hvpav1alpha1.Hvpa{ObjectMeta: metav1.ObjectMeta{Name: e.etcd.Name, Namespace: e.namespace}}
}
func (e *etcd) Snapshot(ctx context.Context, podExecutor kubernetes.PodExecutor) error {
if e.backupConfig == nil {
return fmt.Errorf("no backup is configured for this etcd, cannot make a snapshot")
}
etcdMainSelector := e.podLabelSelector()
podsList := &corev1.PodList{}
if err := e.client.List(ctx, podsList, client.InNamespace(e.namespace), client.MatchingLabelsSelector{Selector: etcdMainSelector}); err != nil {
return err
}
if len(podsList.Items) == 0 {
return fmt.Errorf("didn't find any pods for selector: %v", etcdMainSelector)
}
_, err := podExecutor.Execute(
e.namespace,
podsList.Items[0].GetName(),
containerNameBackupRestore,
"/bin/sh",
fmt.Sprintf("curl -k https://etcd-%s-local:%d/snapshot/full?final=true", e.role, PortBackupRestore),
)
return err
}
func (e *etcd) clientServiceDNSNames() []string {
var domainNames []string
domainNames = append(domainNames, fmt.Sprintf("etcd-%s-local", e.role))
domainNames = append(domainNames, kutil.DNSNamesForService(fmt.Sprintf("etcd-%s-client", e.role), e.namespace)...)
// The peer service needs to be considered here since the etcd-backup-restore side-car
// connects to member pods via pod domain names (e.g. for defragmentation).
// See https://github.com/gardener/etcd-backup-restore/issues/494
domainNames = append(domainNames, kutil.DNSNamesForService(fmt.Sprintf("*.etcd-%s-peer", e.role), e.namespace)...)
return domainNames
}
func (e *etcd) peerServiceDNSNames() []string {
return append(kutil.DNSNamesForService(fmt.Sprintf("etcd-%s-peer", e.role), e.namespace),
kutil.DNSNamesForService(fmt.Sprintf("*.etcd-%s-peer", e.role), e.namespace)...)
}
// Get retrieves the Etcd resource
func (e *etcd) Get(ctx context.Context) (*druidv1alpha1.Etcd, error) {
if err := e.client.Get(ctx, client.ObjectKeyFromObject(e.etcd), e.etcd); err != nil {
return nil, err
}
return e.etcd, nil
}
func (e *etcd) SetBackupConfig(backupConfig *BackupConfig) { e.backupConfig = backupConfig }
func (e *etcd) SetHVPAConfig(hvpaConfig *HVPAConfig) { e.hvpaConfig = hvpaConfig }
func (e *etcd) SetOwnerCheckConfig(ownerCheckConfig *OwnerCheckConfig) {
e.ownerCheckConfig = ownerCheckConfig
}
func (e *etcd) Scale(ctx context.Context, replicas int32) error {
etcdObj := &druidv1alpha1.Etcd{}
if err := e.client.Get(ctx, client.ObjectKeyFromObject(e.etcd), etcdObj); err != nil {
return err
}
if expectedTimestamp, ok := e.etcd.Annotations[v1beta1constants.GardenerTimestamp]; ok {
if err := health.ObjectHasAnnotationWithValue(v1beta1constants.GardenerTimestamp, expectedTimestamp)(etcdObj); err != nil {
return err
}
}
if _, ok := etcdObj.Annotations[v1beta1constants.GardenerOperation]; ok {
return fmt.Errorf("etcd object still has operation annotation set")
}
patch := client.MergeFrom(etcdObj.DeepCopy())
if e.etcd.Annotations == nil {
etcdObj.SetAnnotations(make(map[string]string))
}
etcdObj.Annotations[v1beta1constants.GardenerOperation] = v1beta1constants.GardenerOperationReconcile
etcdObj.Annotations[v1beta1constants.GardenerTimestamp] = TimeNow().UTC().String()
etcdObj.Spec.Replicas = replicas
e.etcd = etcdObj
return e.client.Patch(ctx, etcdObj, patch)
}
func (e *etcd) RolloutPeerCA(ctx context.Context) error {
if !e.hasHAControlPlane() {
return nil
}
etcdPeerCASecret, found := e.secretsManager.Get(v1beta1constants.SecretNameCAETCDPeer)
if !found {
return fmt.Errorf("secret %q not found", v1beta1constants.SecretNameCAETCDPeer)
}
_, err := controllerutils.GetAndCreateOrMergePatch(ctx, e.client, e.etcd, func() error {
// Exit early if etcd object has already the expected CA reference.
if peerTLS := e.etcd.Spec.Etcd.PeerUrlTLS; peerTLS != nil &&
peerTLS.TLSCASecretRef.Name == etcdPeerCASecret.Name {
return nil
}
e.etcd.Annotations = map[string]string{
v1beta1constants.GardenerOperation: v1beta1constants.GardenerOperationReconcile,
v1beta1constants.GardenerTimestamp: TimeNow().UTC().String(),
}
var dataKey *string
if e.etcd.Spec.Etcd.PeerUrlTLS != nil {
dataKey = e.etcd.Spec.Etcd.PeerUrlTLS.TLSCASecretRef.DataKey
}
if e.etcd.Spec.Etcd.PeerUrlTLS == nil {
e.etcd.Spec.Etcd.PeerUrlTLS = &druidv1alpha1.TLSConfig{}
}
e.etcd.Spec.Etcd.PeerUrlTLS.TLSCASecretRef = druidv1alpha1.SecretReference{
SecretReference: corev1.SecretReference{
Name: etcdPeerCASecret.Name,
Namespace: e.etcd.Namespace,
},
DataKey: dataKey,
}
return nil
})
return err
}
func (e *etcd) podLabelSelector() labels.Selector {
app, _ := labels.NewRequirement(v1beta1constants.LabelApp, selection.Equals, []string{LabelAppValue})
role, _ := labels.NewRequirement(v1beta1constants.LabelRole, selection.Equals, []string{e.role})
return labels.NewSelector().Add(*role, *app)
}
func (e *etcd) computeContainerResources(existingSts *appsv1.StatefulSet) (*corev1.ResourceRequirements, *corev1.ResourceRequirements) {
var (
resourcesEtcd = &corev1.ResourceRequirements{
Requests: corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("300m"),
corev1.ResourceMemory: resource.MustParse("1G"),
},
}
resourcesBackupRestore = &corev1.ResourceRequirements{
Requests: corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("23m"),
corev1.ResourceMemory: resource.MustParse("128Mi"),
},
}
)
if existingSts != nil && e.hvpaConfig != nil && e.hvpaConfig.Enabled {
for k := range existingSts.Spec.Template.Spec.Containers {
v := existingSts.Spec.Template.Spec.Containers[k]
switch v.Name {
case containerNameEtcd:
resourcesEtcd = &corev1.ResourceRequirements{
Requests: v.Resources.Requests,
}
case containerNameBackupRestore:
resourcesBackupRestore = &corev1.ResourceRequirements{
Requests: v.Resources.Requests,
}
}
}
}
return resourcesEtcd, resourcesBackupRestore
}
func (e *etcd) computeReplicas(existingEtcd *druidv1alpha1.Etcd) int32 {
if e.replicas != nil {
return *e.replicas
}
if existingEtcd != nil {
return existingEtcd.Spec.Replicas
}
return 0
}
func (e *etcd) computeDefragmentationSchedule(existingEtcd *druidv1alpha1.Etcd) *string {
defragmentationSchedule := e.defragmentationSchedule
if existingEtcd != nil && existingEtcd.Spec.Etcd.DefragmentationSchedule != nil {
defragmentationSchedule = existingEtcd.Spec.Etcd.DefragmentationSchedule
}
return defragmentationSchedule
}
func (e *etcd) computeFullSnapshotSchedule(existingEtcd *druidv1alpha1.Etcd) *string {
fullSnapshotSchedule := &e.backupConfig.FullSnapshotSchedule
if existingEtcd != nil && existingEtcd.Spec.Backup.FullSnapshotSchedule != nil {
fullSnapshotSchedule = existingEtcd.Spec.Backup.FullSnapshotSchedule
}
return fullSnapshotSchedule
}
func (e *etcd) handlePeerCertificates(ctx context.Context) (caSecretName, peerSecretName string, err error) {
// TODO(timuthy): Remove this once https://github.com/gardener/etcd-backup-restore/issues/538 is resolved.
if !e.hasHAControlPlane() {
return
}
etcdPeerCASecret, found := e.secretsManager.Get(v1beta1constants.SecretNameCAETCDPeer)
if !found {
err = fmt.Errorf("secret %q not found", v1beta1constants.SecretNameCAETCDPeer)
return
}
var singedByCAOptions []secretsmanager.SignedByCAOption
if e.caRotationPhase == gardencorev1beta1.RotationPreparing {
singedByCAOptions = append(singedByCAOptions, secretsmanager.UseCurrentCA)
}